http://www.mmo-champion.com/content/3499-Blizzard-Trademarks-Warlords-of-Draenor-WoW-Expansion
Only way this could be done is if it involves time travel, meaning we could be going back to the time of "Tides of Darkness"/"Beyond the Dark Portal"
(http://i.imgur.com/SELmNQi.jpg)